We live in the country, own a feedlot, have 3 kids and have 3 dogs. Needless to say, there is a lot of stuff in our air. My husband and 2 of our kids have respiratory issues. These filters have done a great job of keeping our system as clean as possible in this environment.

I was using the regular version of filters and they worked but weren't the best for our house. I switched to the healthy living ultra allergy filters and they have helped so much! I live in the desert with two large dogs, a husband with lots of allergies and tons of dirt and dust! These are definitely helping a lot more! It feels good knowing I am helping my family stay healthier!

Bought this a month ago after having my unit replaced. I was suffering with severe allergies due to the ductwork and unit being replaced by a very sloppy company, so I decided to give it a shot (it had its work cut out for it) I am replacing it today. Usually lasts a lot longer but my home was contaminated severely due to the negligence of our ac repair company!

[This review was collected as part of a promotion.] You just never know what you don't know. These filters do so much to clean and keep the air quality optimal, but if you've never used them then you just won't know that you are actually deciding to breathe less than perfect air.

I have used these air filters in our home and I am completely sold on their remarkable results. I really am glad that they can take out the germs in the air and make the air in our home purer. I can almost feel and smell the difference when using these filters. Also, it is wonderful not to have to change the filter every month. I appreciate the quality and long lasting ability to keep working and in the long run, they are more economical than others. They are always available at the retair store where we shop.

I live in Michigan and my 2 furnaces run constantly. It is extremely important to me that my family breathes clean, dust/allergen free air. Plus, it makes house cleaning so much easier. The filters are high quality, easy to use and I only have to change them once a year. I wouldn't buy any other brand. Filtrete whole house filters work!

Bought 1 4" airfilter that ended up being 5". Thought it was a fluke and took it back to the store. Went to another store and the only brand availabel was 3m again. Bought a 4" filter and once again measuring in at over 4.5" and does not fit. Last time I buy from 3m. Btw our furnace can fit 2, 2" filters perfectly but not 1, 4".

Bought this yesterday, installed today, it is about a 1/2 inch bigger than the filter it is replacing. Had to force it in the inlet opening, have always had to change my filters every 2 months, I hope this will last longer. and this is just a 2 year old house, and we had the furnace vents cleaned out earlier this year. I am impressed with the fact that the filter uses cotton versus paper as it filtration media.

I HAVE searched and cannot find a better filter than Filtrete. Not only does it make a noticeable difference in the air quality of our home, it has literally saved our HVAC unit. As do most new construction homes, ours came with the standard 'builder grade' system. Coincidentally, we have had a lot of storms and power surges this past summer. When our system (along with seven others in our neighborhood) burnt out last month, we were miraculously able to replace only the compressor, as opposed to the whole system. Since it came at a bad time for us financially, we had to opt for replacing the compressor only. Our HVAC technician told us that had we not been using good filters and replacing them regularly, that would not have been an option. Even though we will eventually have to replace the whole unit, we now have some wiggle room and time to save up. Meanwhile, our 'builder grade' unit and Filtrete filters are functioning beautifully. Thank you, 3M!!! You saved our lives (quite possibly literally--from this Southern heat and humidity)and allowed us some time to research and save for a new HVAC unit down the road a bit.

I use these in place of regular HVAC filters. The 4" depth adds surface are which reduces air flow resistance. My home systems for people with breathing problems includes multiple 20 x 20 x 4 inch filters. My 2400 sq ft home has 5 filters. The efficiency of the HVAC system is not degraded yet the air is best for sufferers of breathing problems such as asthma, RADS, or allergies.